Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
The best workaround I've found is to use the free SharePoint Designer 2010 to bootstrap the MS Office Picture Manager.
You can get the SharePoint Installer from this post:
Then, for more detailed instructions, you can follow the Guide Here:
http://www.askvg.com/how-to-install-and-get-microsoft-office-picture-manager-back-in-office-2013/
The short version is to run the installer.
Then choose "Customize" instead of "Install Now".
Then deselect everything that's not "Office Tools" > "Microsoft Office Picture Manager"